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The content of this document is purely informative. Elia reserves the right to adapt or
modify the content at any time. Elia does not take any responsibility nor liability for the
said content or for the consequences of any action taken on the basis of the information
provided.
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1. Introduction
Elia introduces, in its role as market facilitator, starting the 1st of October 2003, the possibility
to agree bilateral exchanges between ARPs on an intra-day basis and submit the nomination
to Elia until the day after.
The present document summarizes the main characteristics of this new facility.
This document is purely informative. Rights and obligations concerning this new facility are
governed by the ARP-Contract (including the addendum).

2. Product characteristics
The new facility of executing bilateral exchanges between ARPs on an intra-day basis is
based on rules similar to the current day-ahead bilateral exchanges facility.

Day D--1

Day D

Day D+1
14h

14h

As briefly illustrated above, the main characteristics are:


The intra-day and day-ahead transactions are two separated transactions. The
intra-day internal energy transfer (also called intra-day HUB) nomination is
supplementary to the day-ahead position. In other words, the intra-day internal
energy transfer nomination is not a new version of a day-ahead transaction.



The intra-day internal energy transfer nominations can, as illustrated on the
following schema, be submitted to Elia :
 At the soonest after the confirmation of day-ahead internal energy
transfer nominations.
 At the latest at 14h001 (noon) on Day D+1 i.e. 14h00 (noon) on the day
after the execution day (without regard to week-ends or official bank
holidays).
Day-ahead HUB
Confirmation

Day D -1

Day D

14h

14h

Day-ahead HUB
Nomination

1

Day D+1

Intra Day HUB
Nomination

Please note that all hours mentioned in present document are expressed in Belgian time.

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

The intra-day internal energy transfer nominations will contain the same fields as
the current day-ahead internal energy transfer nominations and will also have to
be introduced by both parties (seller and buyer).



If an inconsistency exists between the intra-day internal energy transfer
nominations introduced by the seller and by the buyer, whether both nominations
are different or only one of them has been introduced:
 It will be visible for the ARP on Elia’s E-Nominations system by means
of the status of the nomination ;
 The introduction of corrections will be possible until 14h30 on Day D+1 ;
 After 14h30 on Day D+1, all the inconsistent intra-day internal energy
transfer nominations will be refused and rejected by Elia.



In case of day-ahead inconsistency, this will not be corrected by an intra-day
internal energy transfer nomination.

Consequently, intra-day internal energy transfer allows the ARP to correct its position (and
thus avoid important imbalances) when facing unexpected events, such as the breakdown of
an industrial plant or a generation unit.
An intra-day internal energy transaction is nevertheless intended as a correction on a correct
and complete day-ahead position. This later is important for the security of network
operations. To avoid abuse, following restrictions are applied:


In case of sequential introduction of day-ahead nominations on Day D-1 for which the
total injection does not equal the total off-take per quarter hour on Day D (except for
the rounding off imprecision), the ARP will be prohibited of using the facilities of
intra-day internal energy transfer for a period of 30 calendar days starting
immediately after having been notified by Elia. “Sequential”, in this case, means 3
consecutive calendar days or 5 calendar days in a calendar month.



This prohibition also applies if Elia detects an important and systematic difference
between the measured off-take and the nominated off-take and in case this situation
continues to exist after Elia has notified the ARP.

The aim of these two rules is to assure that the quality of the day-ahead nominated position
will not be degraded by the introduction of the new facility.

3. Contractual aspects
The use of the intra-day internal energy transfer facility is subject to the rights and obligations
mentioned in the addendum of the ARP-Contract 2003 (as sent to the ARPs and as published
on the Elia website).
The facility will be offered to all ARPs as from two working days after reception by Elia of a
duly signed version of this addendum, but not sooner than the 1st of October 2003.
By signing this addendum, an ARP is allowed to use the intra-day internal energy transfer
facility with all other ARPs that have signed the same addendum. No other formalities are
required.
From 2004 onwards, the option of intra-day internal energy transfer will be in a standardised
way included in the ARP-Contract.

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4. Operational aspects
Intra-day internal energy transfer nominations have to be submitted through Elia's ENominations system on the Elia website in the same way as any other nomination (see also
the document “Introduction of programs to Elia – Year 2012: Practicalities” for more
information on this system).
These nominations will:






be submitted before 14h00 (noon) on Day D+1
contain, for each concerned ([ARP From], [ARP To]) pair, a power value for each
quarter-hour of the day
contain only positive values
be submitted with a precision of 0.1 MW
be consistent with the corresponding nomination submitted by the counter-party

Day-ahead and intra-day internal energy transfer nominations will be distinguished by the
“Contract item” reference:


“Business to Business” (B2B) users will introduce the mention “DA” in the “Contract
item” field for day-ahead nominations and the mention “ID” for intra-day
nominations.



“Business to Customer” (B2C) users will have to choose between the day-ahead and
the intra-day environment on the main page.

Several versions of the same schedule may be submitted. The final schedule will be the
schedule with the highest version number that has been validly submitted within the time
limits.
Elia shall inform the ARP by means of its E-Nominations system on Day D+1 whether or not
the ARP’s nominations are accepted. If the ARP has not been informed before 18h00 on Day
D+1, he shall contact Elia Customer Services by phone.